252results about How to "Enhanced transfer process" patented technology

The invention discloses an electrochemical sensor used for bisphenol A detection, which belongs to the technical field of electrochemical analysis detection. The invention also discloses a preparation method for the electrochemical sensor and an application of detecting bisphenol A in a single pattern. The preparation method for the electrochemical sensor comprises the following steps: grafting beta-cyclodextrin to the surface of a carbon nano tube, wherein the beta-cyclodextrin can be easily dispersed into secondary distilled water; dropwise adding a dispersion to a glassy carbon electrode; and evaporating to dry a solvent to obtain the electrochemical sensor constructed by a sensitive film and the glassy carbon electrode. The electrochemical sensor has high sensitivity on detecting the bisphenol A and high stability, and the detection lower limit reaches 1*10-9mol/L.

The invention discloses a method for preparing composite dephosphorus adsorbent by virtue of activated carbon fiber loaded with metal. Carbon fiber is used as a matrix which is loaded with a metallic compound. The method comprises the following steps of: a, mixing lanthanum ions into an iron salt for preparing a mixture solution of iron ions and lanthanum ions; b, putting the prepared solution under an ultrasound environment, additionally adding a radiation method, gradually adding a hydroxide solution into a metallic ion mixture solution until the pH reaches 9-10, and obtaining nano-particle suspension liquid of iron and lanthanum composite metal hydroxide; c, shearing activated carbon fiber into pieces, washing, dipping, filtering and drying; d, weighing the activated carbon fiber, adding the activated carbon fiber into the suspension liquid, processing by utilizing ultrasound waves, taking out solid matters, and washing for multiple times until the pH reaches 7; and e, drying the solid matters, obtaining an adsorbent material after cooling, and sealing the adsorbent material for storage. According to the invention, the iron and lanthanum composite metal hydroxide is in uniform particle size distribution on the carbon fiber matrix, has a high adsorption capacity and a low preparation cost and is suitable for industrial application.

The invention relates to a large-area soft soil foundation duplex negative consolidation processing method, comprising the following processes of: step 1, negative pressure consolidation: (a) paving plastic woven cloths in an area to be processed, driving a vertical plastic drainage board and a vertical plastic soak-away trench; (b) paving a main pipe and a branch pipe, wherein the vertical plastic drainage board and a transverse plastic drainage board are connected with the branch pipe; (c) paving a geo-membrane, and paving two to three sealing membranes on the geo-membrane; (d) excavating a side ditch pressing membrane; (e) installing a vacuum pump to vacuumize for negative pressure precipitation, wherein the main pipe is connected with the vacuum pump; step 2, well point dynamic arrangement: (a) inserting a well point pipe in a hole inserted by a vertical plastic soak-away trench or nearby the hole; (b) paving the branch pipe, the main pipe and the vacuum pump, carrying out the well point dynamic arrangement; and step 3, dynamic consolidation: a) precipitating and dynamically compacting in the first and second times, carrying out precipitation and dynamic compaction processes on the area to be processed for several times, carrying out multiple rounds of point compactions and finally carrying out a full compaction. According to the large-area soft soil foundation duplex negative consolidation processing method, the bearing capacity of the processed field is higher, the hard crust is thicker and the post-construction settlement is less.

The multi-jet composite fluidized bed coal and biomass gasifier consists of a fluidized bed, a synthesized gas outlet, a water vapor inlet and jet pipes. The fluidized bed consists of three parts, including the lower conic bed body, the middle expanding section and the upper expanding section, and has one cyclonic separator inside the upper expanding section. The synthesized gas outlet is in the top of the cyclonic separator. The jet pipes in the lower bed body include radial auxiliary material feeding jet pipes in two layers and main material feeding jet pipes in the center of bed body. The bed body has cinder outlet in the conic bottom and water vapor inlet beside the cinder outlet and the fluidized bed has outside heat insulating layer. The present invention has the advantages of simple structure, low cost and easy operation.

The invention discloses a method for preparing lanthanum and ferric composite absorbing phosphorous removal agent. The method comprises the following steps: firstly, preparing a mixed solution of iron nitrate and lanthanum nitrate; secondly, washing crude activated carbon fiber for a plurality of times through water, putting the washed crude activated carbon fiber into deionized water for dipping, filtering and drying so as to obtain fine activated carbon fiber; thirdly, adding the fine activated carbon fiber into the mixed solution of the iron nitrate and the lanthanum nitrate, and performing ultrasonic treatment on the fine activated carbon fiber, so as to obtain solid matter A; fourthly, putting the solid matter A into an aqueous solution of ammonia for dipping, and filtering the solid matter A; and fifthly, washing a filter cake obtained in the step four for a plurality of times through the deionized water till the pH value is 7, and then drying and cooling the filter cake to be at room temperature, so as to obtain the lanthanum and ferric composite absorbing phosphorous removal agent. The method adopts liquid phase deposition, realizes the uniform loading of two types of metal on the surface of a material, and overcomes the phenomenon of non uniform mixing of the metal due to layering of various metal by adopting direct precipitation method. The adsorbent obtained through using the method has the advantages of high adsorption capacity, high adsorption rate and the like.

The invention belongs to a design technology of protecting structures and relates to an improved /composite material protecting structure, which comprises a ceramic panel (1) and a rear panel bonded with the ceramic panel (1). The ceramic/composite material interlayer protecting structure is characterized in that the rear panel is an interlayer panel which comprises two fiber reinforced resin base composite material plates (2) and a foam aluminum plate (3) clamped between the two fiber reinforced resin base composite material plates, and the fiber reinforced resin base composite material plates (2) and the foam aluminum plate (3) are formed into the interlayer plate bonded by plate cores. The interlayer structural rear panel provides support with greater rigidity for the ceramic panel under the condition of same planar density and fully plays a role of high compression strength of ceramic materials. Closed cell aluminum in the interlayer structure can also delay the transmission of shock waves along the thickness direction when a bullet is shocked, delays the damage of the shock waves to the ceramic panel, and improves the ballistic curve limit speed of an integral protecting structure.

The clean Ta/Nb ore converting process includes decomposing Ta/Nb ore in KOH and molten salt, diluting and separating decomposed product to obtain high concentration KOH solution and solid phase connecting potassium titanate/niobate, hot water leaching and separating potassium hexatitanate/hexaniobate solution and iron-manganese slag precipitate containing insoluble potassium metatitanate/metaniobate; regulating pH value of hexatitanate/hexaniobate solution to alkali to obtain hexatitanate/hexaniobate crystal and reusable crystalline mother liquid; and decomposing potassium metatitanate/metaniobate and iron-manganese slag with HCl solution to obtain metatitanate/metaniobate crystal. The said process has no fluorine ion pollution and high ore decomposing rate, and may produce potassium titanate/niobate as intermediate for producing various Ta/Nb products.

The invention relates to a preparation method of a multifunctional mimic enzyme composite sphere and application thereof. A one pot type in-situ synthesis method is adopted; in an alkaline condition, hemin is used as a reducing agent and a stabilizing agent; after the hemin is mixed with chloroauric acid (HAuCl4), a mineralization reaction is carried out; a gold nanocluster mimic enzyme (Hemin-Au) with high catalytic activity is formed; afterwards, the gold nanocluster mimic enzyme, spherical graphene (SG) and ferroferric oxide (Fe3O4) are mixed and react; subsequently, sodium alginate (SA) and a calcium ion are added to carry out embedment treatment, so as to obtain the multifunctional mimic enzyme composite sphere (SA-Hemin-Au-SG-Fe3O4). The preparation method does to relate to the use of a complicated photoelectric instrument, and has advantages of being high in the catalytic activity, simple to operate, quick in response and low in cost, and the like. The mimic enzyme composite sphere is favorable in effect when being used for the catalysis, the adsorption and the degradation of some environmental organic poisons, such as phenol (Ph), methylene blue (MB), rhodamine B (RB) and the like.

The invention relates to an adjustable eccentric transmission device, wherein the travel of a cylindrical crank pin (21) can be definitely adjusted when a main shaft (1) is running. The eccentric transmission device is in particular applicable for the following machine tools in which cutting tools carry out reciprocating movement with different travels.

The invention relates to a method for chemically plating the surface of diamond with Ni and P in a microwave-ultrasound combined mode and belongs to the technical field of diamond composites. The method includes the steps that firstly, grease and dirt of diamond particles are removed after the diamond particles are boiled in a NaOH solution, and then the surfaces of the diamond particles are roughened after the diamond particles are boiled in a dilute HNO3 solution; the diamond particles obtained after surface roughening are placed in a base colloid palladium solution for sensitization-activation; the diamond particles obtained after sensitization-activation are added into a sodium hypophosphite-water(1/2) solution with the concentration of 30 g/L for surface Pd2+ reduction of the diamond particles; and the diamond particles obtained after surface Pd2+ reduction are added into a chemical plating solution, are plated for 1-1.5 h under the microwave irradiation and ultrasound stirring conditions and stand still after being plated, and the diamond particles plated with Ni-P on the lower layer are washed with distilled water for vacuum drying. According to the method, the microwave irradiation heating technology and the ultrasound technology are combined to be applied to the Ni-P chemical plating process of the surface of the diamond, the quality of a coating is improved, and the coating is flat, smooth, dense, uniform and high in binding capacity and corrosion resistance.

The invention provides a double-functional perovskite/cerium oxide composite oxygen catalyst of a bionic structure and a preparation method, that is, CeO2 nanoparticles are grown on the surface of a perovskite nanofiber or nanotube in situ. According to physiological structure characteristics of fish gills, the perovskite nanofiber or nanotube is prepared by using an electrostatic spinning methodto simulate gill filaments in the fish gills. By using a desolvation or soaking method, nano cerium oxide granules are grown on the surface of the perovskite nanofiber or nanotube in situ to simulategill lamellae on the surfaces of the gill filaments. Due to the structure of the oxygen catalyst of the CeO2 nanoparticles grown on the surface of the perovskite nanofiber or nanotube in situ, the "concerted catalysis effect" of a catalyst body and a second phase can be sufficiently brought into play, the transmission velocity of oxygen ions and electrons can be increased, concentration polarization in the oxygen catalysis process can be degraded, and furthermore the activity of the oxygen catalyst can be improved.

The invention discloses a preparation method of micro-arc oxidation film layer under effect of magnetic field, which comprises the following steps that: decontamination and oil removal are proceeded on the surface of a work piece; micro-arc oxidation treatment are undertaken on the work piece after the decontamination and the oil removal under the effect of the magnetic field to obtain the micro-arc oxidation film layer. The preparation method of the micro-arc oxidation film layer under the effect of the magnetic field reduces the solubility difference polarity trend of the oxidation liquid, accelerates the transfer process of the solvend, promotes the micro-arc oxidation, improves the growth rate of the film layer, can improve the appearance of the micro-arc oxidation film layer, improves the growth rate of the film layer so as to improve the performance of the film layer.

The invention relates to an environment-friendly nano fire-retardant coating which can be used on the surface of flammable base material, and can reduce the surface flammability of the material to be coated and retard the rapid spread of the fire so as to improve the fire endurance of the material to be coated. The fire-retardant coating is prepared by acrylic resin, polyphosphoric acid amine, nano SiO2, pentaerythritol, butanol and titanium dioxide according to ratio of parts by weight. The components are adjusted to the most scientific and reasonable state, a little nano-material is added, therefore the related properties and partial technical indexes of the fire-retardant coating such as fire retardance, antirust property, waterproofness, levelling property and strength are improved, the cost is low, the coating is uniform and continuous, compact and wear-resisting, the tenacity, dyeing property, adhesiveness, fast-drying nature and certain gloss of the coating are improved; and the nanotechnology is effectively combined with the formula and process of the coating, therefore the product quality is improved.

The invention discloses a method for influencing tone perception of reconstructed speech by phase and application in artificial cochlea. The method comprises the steps of performing frequency domain decomposition for an original speech signal by the fourier transform analysis method; changing the signal phase spectrum characteristics to reconstruct and synthesize a new speech; then testing and learning the tone perception of the reconstructed speech. The experiment shows that the quality of reconstructed syllable is reduced by analyzing and reconstructing through the general window length under the conditions that the signal amplitude-frequency characteristics are unchanged and all the initial phases are set to be zero, namely, the phase characteristics influence the tone perception and are related to the signal reconstruction window length; the speech embedding reconstruction method is further carried out, namely, the amplitude-frequency characteristics of different syllables are crisscross embedded with the phase characteristics to reconstruct the syllables to test and learn the tone perception of the reconstructed speech, so as to verify that the tone-pattern perception mainly depends on the phase characteristics.

The invention discloses a method for carrying out import escort under credit card items based on a block chain. The importer node needs to upload the enterprise information and the commodity information to the block chain network; the issuing bank node can conveniently evaluate the credit condition of the import merchant node and the market condition of the commodity; meanwhile, transaction records such as trade contracts, credit cards, cargo exit information, bills, payment records and pickup information need to be signed and confirmed by related organization nodes and uploaded to a block chain network, so that the use of traditional paper receipts is omitted, the trade cost is reduced, the receipt transfer and auditing speed is increased, and the trade activity efficiency is improved. Moreover, the circulation information needs to be uploaded to the block chain network in the whole process of goods circulation and is signed and confirmed by the related nodes, so that the effective monitoring of the goods circulation process is realized, the possibility that import merchant nodes carry goods to escape from credit violations is avoided, the trade safety is improved, and faster, safer and more reliable trade activities are realized.

The invention discloses a method for treating potassium feldspar according to the sub-molten salt method to prepare potassium carbonate. The method comprises the following steps: potassium feldspar reacts in a sub-molten salt NaOH liquid-phase medium, wherein the mass ratio of the NaOH solution to potassium feldspar power is (4:1) to (6:1); acidizing is carried out after reaction, so as to obtain a mother liquid containing potassium; purified sodium carbonate and potassium carbonate products are obtained after acidizing, filtering, and evaporative crystallization are conducted on the mother liquid. The reaction temperature is 145 to 210 DEG C; the potassium dissolution rate is higher than 98 percent. The method for extracting soluble potassium from potassium feldspar has the advantages that the defects in the conventional process are overcome; potassium, aluminum and silicon in potassium feldspar are comprehensively utilized; the energy consumption is low; the process is simple; environmental pollution is avoided; a new way for decomposing and deep processing of middle-low grade potassium feldspar is found.

The invention discloses an oscillatory flow reactor of a packed bed. The oscillatory flow reactor comprises an oscillation generating mechanism, an inlet segment, a reaction segment and an outlet segment which are sequentially connected, wherein the inlet segment is composed of an air inlet segment and a liquid inlet segment which are connected in series, and the outlet segment is composed of an air outlet segment and a liquid outlet segment which are connected in series; the air inlet segment is provided with an air feeding hole and an air distributor located at the downstream of an air discharging hole; the liquid inlet segment is provided with a liquid feeding hole and a liquid distributor located at the downstream of a liquid discharging hole; the reaction segment is provided with a vertically-arranged reaction tube which is filled with filler or solid catalyst particles in the middle, a supporting device at the bottom and a pressing device at the top. The oscillatory flow reactor of the packed bed is suitable for industrial gas-liquid reaction taking the liquid phase as a main body, gas-liquid-liquid reaction or gas-liquid-solid three-phase reaction system containing a solid catalyst and can continuously and stably operate for a long term.